Impact of Day-3 embryo cell number on pregnancy, obstetric and perinatal outcomes in frozen-thawed single blastocyst transfer cycles - Scorecard - MDSpire

Impact of Day-3 embryo cell number on pregnancy, obstetric and perinatal outcomes in frozen-thawed single blastocyst transfer cycles

  • By

  • Feng Xiong

  • Caiyun Wan

  • Xiaoqi Peng

  • Qing Sun

  • Shiru Xu

  • Lianghui Diao

  • Peilin Chen

  • Huixian Zhong

  • Meilan Mo

  • Tao Zhang

  • June 22, 2026

  • 0 min

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Clinical Scorecard: Influence of Day-3 Embryo Cell Count on Pregnancy, Obstetric, and Perinatal Results in Cycles of Frozen-Thawed Single Blastocyst Transfer

At a Glance

CategoryDetail
ConditionDay-3 embryo cell count in IVF cycles
Key MechanismsImpact of embryo cell number on pregnancy outcomes
Target PopulationPatients undergoing frozen-thawed single blastocyst transfer
Care SettingReproductive health and fertility clinics

Key Highlights

  • Findings inform embryo selection and patient counseling during IVF treatment.

Guideline-Based Recommendations

Diagnosis

  • Evaluate Day-3 embryo cell number as a key indicator of embryo quality.

Management

  • Consider the cell number when selecting embryos for transfer in IVF cycles.

Monitoring & Follow-up

  • Monitor pregnancy outcomes including clinical pregnancy, ongoing pregnancy, and live birth rates.

Risks

  • Be aware of reduced pregnancy outcomes associated with ≤5 or 6 cell embryos.

Patient & Prescribing Data

Patients undergoing their first frozen-thawed SBT cycle.

Embryos with ≤5 or 6 cells may have lower success rates in achieving live births.

Clinical Best Practices

  • Use multivariable logistic regression to adjust for relevant covariates in outcome analysis.
  • Perform sensitivity analyses and propensity score matching to validate findings.

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